Between the two parts of the concert is an interval, _______ the audience can buy ice-cream.
| A．when |
| B．where |
| C．that |
| D．which |
—I’d like some more cheese.
—sorry, there’s left.
| A．some | B．none |
| C．a little | D．few |
I was fortunate to pick up a wallet on the ground on the way home, but unfortunately for me, I found my color TV set when I got home.
| A．lying; stolen | B．laying; stealing |
| C．lay; stolen | D．lying; stealing |
In order to find the missing child, villagers all they can over the past five hours.
| A．did | B．do |
| C．had done | D．have been doing |
The head of the company promised to deal with matters of this sort he returned to his office.
| A．until | B．while |
| C．at the time | D．the moment |
We can never expect bluer sky unless we create less polluted world.
| A．The; the | B．/; the |
| C．A; the | D．a; a |